Gender and Breed?? Black and Orange Chicks

I have 3 chicks of this color (about 3 weeks old). Two of them look similar (I only show one here - Chick #1 in the pictures below) and the third (Chick #2 in the pictures below) has much more coloring on its chest, but the same brown/black colors. The only other noticeable difference is that the two that look similar (Chick #1) both also have an orange "middle toe" while the others are grey whereas Chick #2 has all grey toes (not sure if this is significant or not, but thought I'd mention it). I'm totally new to this (posting pictures and raising chickens) so any help would be greatly appreciated!